Internal tray for transporting battery cells and tray for transporting battery cells including the internal tray

Abstract

The present invention relates to an internal tray for transporting battery cells, which is installed in an external tray and accommodates a plurality of pouch-type battery cells. The internal tray for transporting battery cells includes: a substrate that extends in the longitudinal direction of the pouch-type battery cells; a plurality of insertion plates that are mounted on the substrate to stand upright, and leads of the pouch-type battery cells are inserted into the plurality of insertion plates to be supported; and a cushion pad that is mounted on the substrate to extend in the longitudinal direction of the pouch-type battery cells, and the pouch-type battery cells are loaded on the cushion pad. The present invention also relates to a tray for transporting battery cells, which includes: an internal tray for transporting battery cells; an external tray for transporting battery cells, in which the internal tray for transporting battery cells is accommodated; and a fastening member that is used to fasten the external tray to the internal tray for transporting battery cells.

Description

Technical Field

[0001] The present invention relates to an inner tray for transporting battery cells. More particularly, the present invention relates to an inner tray for transporting battery cells that can prevent damage to pouch-type battery cells by absorbing impacts applied to the battery cells during transportation of the battery cells.

[0002] In addition, the present invention relates to a tray for transporting battery cells, the tray for transporting battery cells including an inner tray for transporting battery cells.

[0003] This application claims the benefit of priority based on Korean Patent Application No. 10-2020-0175324, filed on December 15, 2020, and the entire contents of the Korean patent application are incorporated herein by reference. Background Art

[0004] As energy prices rise due to the depletion of fossil fuels and concerns about environmental pollution increase, the demand for environmentally friendly alternative energy has become an indispensable factor in future life. In particular, with the technological development and increasing demand for mobile devices, the demand for secondary batteries as an energy source is rapidly increasing.

[0005] Generally, lithium secondary batteries are mainly classified into cylindrical batteries, prismatic batteries, and pouch-type batteries according to their appearance, and are also classified into lithium-ion batteries, lithium-ion polymer batteries, and lithium polymer batteries depending on the type of electrolyte solution.

[0006] Secondary batteries are classified according to the structure of an electrode assembly having a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. Some examples thereof include: a jelly roll type (wound type) electrode assembly in which a long sheet-type positive electrode and a negative electrode are wound with a separator interposed therebetween; a stacked-folded type electrode assembly having a structure in which unit monomers (such as double monomers or full monomers) stacked in a state where a positive electrode and a negative electrode of a predetermined unit are laminated through a separator are wound; and the like.

[0007] In addition, secondary batteries are manufactured by injecting an electrolyte as a liquid electrolyte and sealing the battery container in a state where the electrode assembly is accommodated in the battery container.

[0008] The pouch-type battery in a secondary battery can be manufactured into various forms of batteries so that the secondary battery is used in various electro-mechanical products such as automobiles and mobile devices.

[0009] Figure 1Shows the general structure of a pouch-type battery cell. The pouch-type battery cell includes a cell that stores electric power, a pouch 12 that surrounds the cell, and a lead 13 for charging and discharging. In Figure 1 the battery cell, the lead 13 is provided at both sides, but the lead 13 may also be provided at only one side (not shown).

[0010] In a conventional battery production line, a battery cell transfer tray capable of accommodating a large number of battery cells is used as a device for safely transferring battery cells during transfer between processes or during finished product shipment. Figure 2 Shows an example of a conventional battery cell transfer tray.

[0011] As shown in the figure, the battery cell transfer tray includes an outer tray 200 and an inner tray 100, and the battery cell is actually accommodated in the inner tray 100. The inner tray 100 is accommodated in the outer tray 200, and a substrate 120 of the inner tray 100 is fastened to the outer tray 200 by a fastening member 300. The inner tray 100 includes a plurality of insertion plates 110 and 110', and the plurality of insertion plates 110 and 110' are provided on the substrate 120 of the inner tray 100 to allow insertion of the leads of the battery cell 10. The insertion plates 110 and 110' are arranged to face each other at both sides of the substrate 120 so that the leads at both sides of the battery cell 10 can be inserted. In addition, a slot 111 for battery insertion is formed between two adjacent insertion plates 110. However, the conventional battery cell transfer tray has the following problem: when transferring a pouch-type battery cell, cracks are generated at the edge portion of the battery cell.

[0012] Figure 3 Shows a front view and a side view of a state in which the illustrated pouch-type battery cell has been accommodated in Figure 2 the battery cell transfer tray.

[0013] A groove A is formed in the pouch-type battery cell transfer tray in the longitudinal direction of the battery cell so that, as shown in Figure 3 (b), the pouch 12 can be accommodated in the substrate 120 between adjacent insertion plates 110. However, in a case where the direction is changed while transferring the battery cell using the battery cell transfer tray, if the battery cell moves horizontally or the tray suddenly stops, the battery cell accommodated in the slot bounces up due to inertia and then falls back to its original position again. In this case, as indicated by the dotted circle in Figure 3 (b), the pouch 12 may contact the edge portion of the cell 11 accommodated in the pouch and may collide with the edge of the groove A, thereby generating cracks.

[0014] Since the inner tray 100 is made of hard plastic, if the force as described above is repeatedly applied to the pouch-type battery cell 10 in the slot 111, cracks may become severe and the battery may break severely.

[0015] Therefore, a technology capable of preventing the above-mentioned cracks in the pouch-type battery cell is required.

[0016] [Prior Art Documents]

[0017] [Patent Documents]

[0018] Korean Patent Publication No. 10-1882647 Summary of the Invention

[0019] Technical Problem

[0020] It is believed that the present invention solves at least some of the above problems. For example, an aspect of the present invention provides an inner tray for battery cell conveyance that can prevent cracks in a pouch-type battery cell.

[0021] In addition, the present invention provides a tray for battery cell conveyance including the inner tray.

[0022] Technical Solution

[0023] The inner tray for battery cell conveyance of the present invention for accommodating a pouch-type battery cell to solve the above problems includes: a substrate that extends in the longitudinal direction of the pouch-type battery cell; a plurality of insertion plates that stand upright and are provided on the substrate, and leads of the pouch-type battery cell are inserted into the plurality of insertion plates to be supported; and a buffer pad that extends in the longitudinal direction of the pouch-type battery cell and is provided on the substrate, and the pouch-type battery cell is mounted on the buffer pad.

[0024] In one example, the buffer pad is an elastic member or a foam body.

[0025] In one example, the buffer pad can be manufactured by a vacuum forming method.

[0026] In a specific example, the buffer pad can be formed of at least one selected from the group consisting of: silicone-based resins, polyurethane-based resins, epoxy-based resins, polyester-based resins, and acrylic-based resins.

[0027] In another specific example, the buffer pad can be formed of at least one polymer foam selected from the group consisting of: polyurethane resin, polystyrene resin, polyolefin resin, phenolic resin, PVC resin, urea resin, silicone resin, polyimide resin, melamine resin, and PET resin.

[0028] In one example, the insertion plates can be arranged on both sides of the substrate in a paired manner to face each other. Multiple pairs of insertion plates can be arranged side by side in the thickness direction of the pouch-type battery cell, and slots can be formed between the insertion plates adjacent to each other in the thickness direction of the pouch-type battery cell, and the leads of the pouch-type battery cell are inserted into the slots.

[0029] In one example, the cushion pads can be arranged on the substrate at positions adjacent to the insertion plates.

[0030] In addition, multiple cushion pads can be arranged on the substrate in the longitudinal direction of the pouch-type battery cell.

[0031] In a specific example, a pair of cushion pads can be arranged on the substrate, and each cushion pad in the pair of cushion pads can be arranged to be spaced apart from the center of the substrate by a predetermined distance and can be arranged to be adjacent to each insertion plate on both sides of the substrate.

[0032] In one example, a pair of substrates can be provided, and the pair of substrates are arranged to be spaced apart in the longitudinal direction of the pouch-type battery cell. The insertion plates and the cushion pads can be arranged at each of the substrates, and the cushion pads can be arranged to be adjacent to the insertion plates.

[0033] In another example, the cushion pads can be placed across between the pair of substrates and can extend toward the insertion plates with a predetermined length.

[0034] In still another example, a stepped portion can be formed along the outer side of a part where the insertion plates have been arranged, as the positions where the end faces of the two ends of the substrate face the cushion pads.

[0035] Specifically, the height of the cushion pads can be greater than the height of the stepped portion.

[0036] In another example, ear-shaped portions can be formed on the lower part of the insertion plates, and the ear-shaped portions protrude in the longitudinal direction of the pouch-type battery cell.

[0037] The present invention also relates to a tray for transporting battery cells, which includes: the above-mentioned internal tray for transporting battery cells; an external tray for transporting battery cells, and the internal tray is accommodated in the external tray; and a fastening member for fastening the external tray to the internal tray.

[0038] Advantageous Effects

[0039] According to the present invention, by arranging cushion pads on the surface where the pouch-type battery cells are installed, it is possible to prevent cracks that may occur at the edges of the pouch-type battery cells.

[0040] Therefore, it is possible to effectively transport the battery cells without worrying about the generation of cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 FIG. is a schematic view showing the form of a conventional pouch-type battery cell.

[0042] Figure 2 FIG. is a schematic perspective view of a conventional battery cell transfer tray.

[0043] Figure 3 FIGS. show a front view and a side view of a state in which the illustrated pouch-type battery cell is accommodated in a conventional battery cell transfer tray.

[0044] Figure 4 FIGS. show a front view and a side view of a state in which the illustrated pouch-type battery cell is accommodated in a tray for battery cell transfer according to an embodiment of the present invention.

[0045] Figure 5 FIG. shows a front view of a state in which the illustrated pouch-type battery cell is accommodated in a tray for battery cell transfer according to another embodiment of the present invention.

[0046] Figure 6 FIG. shows a front view of a state in which the illustrated pouch-type battery cell is accommodated in a tray for battery cell transfer according to still another embodiment of the present invention.

[0047] Figure 7 FIG. shows a front view of a state in which the illustrated pouch-type battery cell is accommodated in a tray for battery cell transfer according to still another embodiment of the present invention.

[0048] Figure 8 FIG. is a perspective view of a tray for battery cell transfer including an inner tray for battery cell transfer.

[0049] Figure 9 FIG. is a schematic perspective view showing a state in which a pouch-type battery cell is stored in an inner tray for battery cell transfer as Figure 7 a modified example. DETAILED DESCRIPTION

[0050] Hereinafter, the detailed configuration of the present invention will be described in detail with reference to the drawings and various embodiments. The embodiments described below are exemplary to facilitate the understanding of the present invention, and for the purpose of helping to understand the present invention, the drawings are not shown to scale, and the dimensions of some components may be exaggerated.

[0051] Since the inventive concept of the present invention allows various changes and multiple embodiments, specific embodiments will be shown in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific forms disclosed, and it should be understood to include all changes, equivalents, and alternatives included in the spirit and scope of the present invention.

[0052] The internal tray for battery cell conveyance for accommodating a pouch-type battery cell according to the present invention includes: a base plate extending in the longitudinal direction of the pouch-type battery cell; a plurality of insertion plates erected and disposed on the base plate, and leads of the pouch-type battery cell are inserted into the plurality of insertion plates to be supported; and a buffer pad extending in the longitudinal direction of the pouch-type battery cell and disposed on the base plate, and the pouch-type battery cell is mounted on the buffer pad.

[0053] The present invention is characterized in that, in the slot into which the pouch is inserted, a buffer pad for absorbing shock is disposed on the base plate of the internal tray for battery cell conveyance, thereby absorbing the shock caused by the movement of a conventional tray for accommodating a pouch-type battery cell. Even if the battery cell bounces or moves horizontally, the shock can be absorbed by the buffer pad, thereby preventing cracks from occurring on the battery cell.

[0054] Specific embodiments of the present invention will be described below with reference to the drawings.

[0055] (First Embodiment)

[0056] Figure 4 A front view and a side view showing a state in which a pouch-type battery cell 10 is accommodated in a tray 100 for battery cell conveyance according to an embodiment of the present invention are shown.

[0057] As shown in Figure 4 the present invention is characterized in that the buffer pad 130 is disposed and extends on the base plate 120 in the longitudinal direction of the battery cell. If the pouch-type battery cell 10 is inserted into the slot 111 of the insertion plate 110, then as shown in Figure 4 (b), even in the case where the battery cell bounces and then falls again, the buffer pad 130 absorbs the shock, thereby preventing cracks from occurring at the edge portion of the battery cell 10.

[0058] Here, the structures of the base plate 120 and the insertion plate 110 may be the same as the conventional structures described in Figure 2 That is, the base plate 120 extends in the longitudinal direction of the battery cell. A plurality of insertion plates 110 and 110' are erected and disposed on the base plate. As shown in Figure 4As shown in (a), the insertion plates 110 and 110' are disposed on both sides of the substrate to form a pair facing each other. In the case of this example, the insertion plates 110 and 110' are disposed to accommodate the pouch-type battery cell 10 having leads 13 on both sides. In addition, a plurality of insertion plates 110 and 110' are arranged side by side in the thickness direction of the battery cell, and a slot 111 is formed between adjacent insertion plates 110 and 110', and the leads of the battery cell are inserted into the slot 111. The above-mentioned buffer pad 130 is disposed on the substrate 120 of the portion where the slot has been formed. The buffer pad 130 extends in the longitudinal direction of the battery cell and is disposed (see Figure 4 (a)). As shown in Figure 4 (b), since the buffer pad 130 contacts the edge portion of the battery cell, the edge portion of the substrate at the lower portion of the buffer pad is prevented from contacting the battery cell.

[0059] Preferably, the buffer pad 130 is disposed on the substrate 120 at a position adjacent to the insertion plates 110 and 110'. This is because if the buffer pad 130 is disposed on the substrate 120 at a position too far from the insertion plates 110 and 110', it is difficult to stably support both side portions of the battery cell. In addition, in order to stably support the bottom of the battery cell, the buffer pad 130 should extend in the longitudinal direction of the battery cell 10 with a predetermined length or more.

[0060] In addition, the buffer pad 130 may be composed of a single pad extending in the longitudinal direction of the battery cell, but as shown in Figure 4 (a), a plurality of buffer pads may be disposed such that the plurality of buffer pads are spaced apart from each other in the longitudinal direction of the pouch-type battery cell. In a specific example, a pair of buffer pads may be disposed on the right and left sides of the buffer pad. In this form, it is possible to stably support the lower portions of both sides of the battery cell while preventing material consumption of the buffer pad. In this case, each of the pair of buffer pads 130 may be arranged to be at a predetermined distance from the center of the substrate, and may be arranged adjacent to each of the insertion plates 110 and 110' on both sides of the substrate.

[0061] Since the buffer pad 130 should absorb the impact caused by the movement of the battery cell, the buffer pad 130 should be made of a material softer than the material of the inner tray 100 or the substrate 120. For example, the buffer pad may be an elastic member or a foam body. For example, a material such as rubber having elasticity can be used. Alternatively, a plastic resin having an elastic polymer matrix can also be used. In this example, the buffer pad may be formed of at least one selected from the group consisting of a silicone-based resin, a polyurethane-based resin, an epoxy-based resin, a polyester-based resin, and an acrylic-based resin.

[0062] The cushioning pad can be made of at least one selected from the group consisting of: polyurethane resin, polystyrene resin, polyolefin resin, phenolic resin, PVC resin, urea resin, silicone resin, polyimide resin, melamine resin, and PET resin.

[0063] The cushioning pad of the present invention can be made of any soft material capable of absorbing the impact of the battery cell. For example, a porous, expandable composite material can be used.

[0064] Preferably, the cushioning pad is manufactured by a vacuum forming method suitable for diversified small-batch production. In this way, the shape of the cushioning pad can be modified in various ways, and thus it can be applied to the tray for transporting battery cells. The weight can be reduced by forming appropriate weight-reducing units.

[0065] (Second Embodiment)

[0066] Figure 5 A front view showing a state in which the illustrated pouch-type battery cell has been accommodated in the tray for transporting battery cells according to the second embodiment of the present invention.

[0067] In this example, a pair of substrates 120 and 120' are provided, and the pair of substrates 120 and 120' are arranged to be spaced apart in the longitudinal direction of the pouch-type battery cell. If Figure 4 the substrates are integrated, then Figure 5 the substrates are separated. In this embodiment, the insertion plates 110 and 110' and the cushioning pads 130 and 130' are respectively installed in the substrates 120 and 120'.

[0068] The cushioning pads are installed adjacent to the insertion plates and are installed on the substrates in a manner that extends in a predetermined length in the longitudinal direction of the battery cell, so as to stably support the load of the battery cell.

[0069] (Third Embodiment)

[0070] Figure 6 A front view showing a state in which the illustrated pouch-type battery cell has been accommodated in the tray for transporting battery cells according to the third embodiment of the present invention.

[0071] In this embodiment, a pair of substrates 120 and 120' are provided, and the pair of substrates 120 and 120' are arranged to be spaced apart in the longitudinal direction of the pouch-type battery cell. The difference from the second embodiment is that the cushioning pad 130 is placed across between the pair of substrates 120 and 120' and extends toward the insertion plates 110 and 110' in a predetermined length. When the cushioning pad is firmly installed on the cushioning pad, the cushioning pad 130 functions to fasten the pair of substrates, and accordingly also functions to increase the stiffness of the internal tray for transporting battery cells.

[0072] (Fourth Embodiment)

[0073] Figure 7 A front view showing a state in which a pouch-type battery cell is accommodated in a tray for battery cell conveyance according to a fourth embodiment of the present invention.

[0074] In this example, as in the embodiment of Figure 5 , a pair of substrates 120 and 120' are provided, and the pair of substrates 120 and 120' are arranged to be spaced apart in the longitudinal direction of the pouch-type battery cell. The difference from Figure 5 is that a stepped portion 131 is formed along the outside of a part where the insertion plate is already provided, as the position of the end faces of the substrates against the buffer pads 130. That is, since the stepped portion 131 is formed on the substrate 120 at the outer end of the insertion plate, a space for accommodating the pouch portion when the battery cell is accommodated is created between the stepped portions 131 and 131' and the buffer pads 130 and 130'. Although not clearly shown in Figure 7 , in addition to the cell portion, the pouch-type battery cell includes a pouch portion around the cell, and accordingly, if the stepped portion is formed as described above, the pouch portion can be conveniently accommodated in the space between the stepped portion and the buffer pad. Further, if there is the above space, the possibility that the edge portion of the pouch-type battery cell contacts the substrate is significantly reduced. That is, by lifting the battery cell with the buffer pads 130 and 130', the possibility that the edge portion of the battery cell contacts the substrate is reduced, and by forming the stepped portions 131 and 131', the possibility that the edge portion of the battery cell can receive an impact can be further reduced. At this time, the height of the buffer pads 130 and 130' can be set to be the same as the height of the stepped portions 131 and 131'. However, it is preferable that the height of the buffer pad is set to be greater than the height of the stepped portion, so as to prevent impacts on the edge portions on both sides of the battery cell.

[0075] Figure 8 is a perspective view of a tray 1000 for battery cell conveyance including an internal tray 100 for battery cell conveyance.

[0076] As shown in Figure 8 , the internal tray 100 for battery cell conveyance of the present invention includes a plurality of insertion plates 110 and 110' on both sides of the substrates 120 and 120'. Further, a slot 111 for accommodating the battery cell is formed between the insertion plates. Buffer pads 130 and 130' capable of absorbing impacts extend in the longitudinal direction of the battery cell and are provided on the substrates 120 and 120' of the insertion plates. In addition, a plurality of buffer pads 130 and 130' are also provided in the width direction of the battery cell according to the number of slots of the insertion plates.

[0077] As inFigure 8 As shown in Figure 8 , the present invention provides a tray 1000 for transporting battery cells, which includes an inner tray 100. That is, if the inner tray 100 is received in an outer tray 200 and the outer tray is fastened to the inner tray by a fastening member 300, then the tray for transporting battery cells is completed as a whole. In this example, the base plates 120 and 120' of the inner tray are fastened to the outer tray 200 by the fastening member 300. However, in some cases, the rear portions of the insertion plates 110 and 110' may be fastened to the side members of the outer tray 200 by the fastening member 300.

[0078] The outer tray 200 is made of a hard plastic resin, spatially separates the area where the battery cells are installed from the outside, and the outer tray 200 has an open top for taking out and installing the battery cells. In addition, at least a part of the side plate is opened for assembling or disassembling the inner tray 100 or the insertion plates 110 and 110' accommodated therein. A plurality of ribs are formed at necessary positions to enhance the stiffness of the surface elements of the outer tray 200, and lightweighting is achieved within the range without reducing the stiffness.

[0079] Figure 9 is a schematic perspective view showing a state in which pouch-type battery cells have been stored in an inner tray for transporting battery cells as a Figure 7 modified example. Figure 9 is a perspective view of a part corresponding to part B at the lower left of Figure 8 and the structure of the insertion plate 110 is different from the Figure 7 and Figure 8 structures.

[0080] In Figure 9 , as in the embodiment of Figure 7 , step portions 131 are formed at both ends of the base plate as the outer sides of the insertion plate. In addition, since a space 120a is formed between the step portions 131 and the buffer pads 130, the space for accommodating the bag portion is provided as described above. In addition, this space prevents the lower end of the pouch-type battery cell from contacting the base plate 120.

[0081] In this modified example, ear-like portions 112 are formed, in which the insertion plate 110 protrudes downward in the longitudinal direction of the battery cell (i.e., in the inner side direction of the inner tray). In this form, when the battery cells are received between the insertion plates, the ear-like portions 112 can stably support the battery cells.

[0082] At this time, the buffer pads 130 can be arranged on the base plate adjacent to the ear-like portions 112 of the insertion plate, thereby supporting the battery cells.

[0083] In the foregoing, the present invention has been described in more detail by means of the accompanying drawings and examples. Accordingly, the embodiments described in the specification and the configurations described in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention. It should be understood that various equivalents and modifications may exist to replace them when this application is filed.

[0084] Explanation of Reference Numerals

[0085] 10: Pouch-type battery cell

[0086] 100: Inner tray

[0087] 110, 110': Insertion plate

[0088] 111: Slot

[0089] 112: Ear-like part

[0090] 120, 120': Substrate

[0091] 120a, 120a': Space

[0092] 130, 130': Buffer pad

[0093] 131, 131': Step part

[0094] A: Groove

[0095] 200: Outer tray

[0096] 300: Fastening member

[0097] 1000: Tray

Claims

1. An internal tray for transporting battery cells, the internal tray being installed in an external tray and accommodating a plurality of pouch-type battery cells, the internal tray comprising: A substrate that extends in the longitudinal direction of the pouch-type battery cells; A plurality of insertion plates that stand upright and are provided on the substrate, and leads of the pouch-type battery cells are inserted into the plurality of insertion plates to be supported; And A cushion that extends in the longitudinal direction of the pouch-type battery cells and is provided on the substrate, and the pouch-type battery cells are mounted on the cushion, wherein a stepped portion is formed along the outer side of the portion where the insertion plates have been provided to serve as positions where both end faces of the substrate face the cushion.

2. The internal tray according to claim 1, wherein The cushion is an elastic member.

3. The inner tray according to claim 1, wherein, The cushion is a foam body.

4. The internal tray according to claim 1, wherein, The cushion is manufactured by a vacuum forming method.

5. The internal tray according to claim 1, wherein, The cushion is formed of at least one selected from the group consisting of the following materials: silicone-based resin, polyurethane-based resin, epoxy-based resin, polyester-based resin, and acrylic-based resin.

6. The inner tray according to claim 3, wherein, The cushion is formed of at least one polymer foam selected from the group consisting of the following materials: polyurethane resin, polystyrene resin, polyolefin resin, phenolic resin, PVC resin, urea resin, silicone resin, polyimide resin, melamine resin, and PET resin.

7. The inner tray according to claim 1, wherein, The insertion plates are provided in pairs on both sides of the substrate to face each other, multiple pairs of insertion plates are arranged side by side in the thickness direction of the pouch-type battery cells, and a slot is formed between the insertion plates adjacent in the thickness direction of the pouch-type battery cells, and the leads of the pouch-type battery cells are inserted into the slot.

8. The inner tray according to claim 7, wherein, The cushion is provided on the substrate at a position adjacent to the insertion plate.

9. The inner tray according to claim 7, wherein, A plurality of cushions are provided on the substrate in the longitudinal direction of the pouch-type battery cells.

10. The inner tray according to claim 9, wherein, A pair of cushions are provided on the substrate, and each cushion in the pair of cushions is arranged to be spaced apart from the center of the substrate by a predetermined distance and is arranged to be adjacent to each insertion plate on both sides of the substrate.

11. The internal tray according to claim 2, wherein, A pair of substrates are provided, the pair of substrates are arranged to be spaced apart in the longitudinal direction of the pouch-type battery cells, the insertion plates and the cushions are provided at each of the substrates, and the cushions are provided to be adjacent to the insertion plates.

12. The inner tray according to claim 11, wherein, The cushion is placed to span between the pair of substrates and extends toward the insertion plate with a predetermined length.

13. The inner tray according to claim 1, wherein, The height of the cushion is greater than the height of the stepped portion.

14. The inner tray according to claim 7, wherein, An ear-shaped portion is formed on the lower part of the insertion plate, and the ear-shaped portion protrudes in the longitudinal direction of the pouch-type battery cells.

15. The internal tray according to claim 14, wherein, The cushion is provided on the substrate at a position adjacent to the ear-shaped portion of the insertion plate.

16. A tray for transporting battery cells, the tray comprising: The internal tray for transporting battery cells according to claim 1; An external tray for transporting battery cells, the internal tray being accommodated in the external tray; And Fastening member for fastening the outer tray to the inner tray.

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